Warp stop-motion for looms.



Patented Nov. I2, 190|.'I A. E. STAFFORD. WARP STOP MOTION FR LOOMS.

(Application led July 12, 1901.)

(No Model.)

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m: Nonms trans no4 Moroumu, msnm NITED STATES PATENT OFFICE.

ALFRED E. STAFFORD, OF I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSA- Ol-IUSETTS.

WARP STOP-'MOTION FOR LOOMS.

SPECIFIGATXON forming part of Letters Patent No. 686,48 5, dated November 12, 1901. Application filed July 12, 1901. Serial No. 67,944. (No model.)

To @ZZ whom, t may concern:

Be it known that I, ALFRED E. STAFFORD,

'a citizen of the United States, and ar'esident lof Hopedale, county of Vorces'ter, State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in 'connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to the supporting means for the lease-rods of a loom and the arrangement of the controlling detectors of a warp stop-motion relative to the lease-rods, whereby certain new and useful results are attained, as will more fully appear.

Various other novel features of the invention will be hereinafter described, and particularly pointed out in the followingclaims.

Figure l is a cross-section of a portion of a loom with one practical embodiment of the present invention applied thereto. Fig. 2 is an enlarged rear elevation of a portion of the stop-motion apparatus near the left-hand side of the loom, one of the lease-rods beingbroken off at its end. Fig. 3 is a side elevation of the mechanism shown in Fig. 2 looking toward the left, and Fig. 4 is a perspective detail of one of the supporting connections on heads to which the lease-rods are secured.

Referring to Fig. I, the loom sides A are each provided with upright stands AX between the whip-roll W and harnesses H, each stand having bolted to it a depending bracket B, the outwardly-extended ear bx of the bracket resting on the top of the stand. The ears bx extend outward slightly beyond the stands (see Fig. 2) and are provided with fulcrum or pivot studs o, which are extended through upright elongated slots cx in heads O, shown as long round-ended plates (see Figs. 3 and 4f) and provided with holes c c near their ends..

Suitable pins 2 through the studs h prevent accidental withdrawal of the heads therefrom. The lease-.rods L L', which are herein shown as counterparts and substantially elliptical in cross-section, fit snugly into the holes c c in the heads C and are pinned in place by suitable pins 3, so that the heads rigidly oonnect the lease-rods, rocking movement of the heads being permitted on the fulcra o, and so, too, the lease-rods have a limited rising-andfalling movement by virtue of the slots c in the heads. By this structure the lease-rods can readily accommodate themselves to changing conditions in warp tension or movement; but they are held from movement or displacement in the direction of warp travel. A better and more uniform action upon the warps is eected by such construction and arrangement as described.

The inner face of each bracket Bis provided with two downwardly-converging shoulders 4, Figs. l and 2, and dotted lines, Fig. 3, and a horizontal eye h extends inward from the top of each bracket between the lease-rods, Fig. l, and dotted lines, Fig. 2, while a horizontal shelf or rest 5 overhangs on the inner face of the bracket an opening 6 in the lower end ofthe latter. Flat detector supports or guides dx rest at their. lower edges on the shelves 5, said supports extending transversely across the loom from one to the other bracket, with their outer faces resting against the inclined shoulders 21, the supports being tightly held in place at each end by a lockingwedge 192,'forming the head of an upright sleeve b3, which passes loosely through the eye b', as clearly shown in Fig. l. A screwbolt b4 is passed down through the sleeve and wedge-like head b2 into a threaded hole inthe shelf 5, a coiled spring SX being shown-in Fig. l between the shelf and the wedge to lift the latter when the screw b4 is turned to release or unclamp the detector-supports. The detectors d, shown as thin, flat, and elongated plates longitudinally slotted at 7, are strung upon the supports, upon which they are free to slide up and down, and owing to the inclination and location of the said supports the two seriesof detectors have their upper ends below the two lease-rods, so that-the latter prevent jumping of the detectors. Upon one division, as w, of the warp the front series of detectors are hung, and the rear series are hung on the other division w' of the warp adjacent the lease-rods, as clearly shown in Fig. l, the warps normally maintaining the detectors elevated and in inoperative position. A released detector descends in an inclined IOO path and its lower end is brought into coperation with the feeling devices, through which the usual stopping means is made operative, the shipper S, Fig. 1, being the only member of such means herein shown. Herein the feeling device is substantially as shown in United States Patent No. 673,826, dated May 7, 1901, and comprises, essentially, a i'lat plate f, having its edges recessed to present series of square teeth f and constituting the movable member or feeler propel', it being normally reciprocated in a horizontal plane by suitable means-as,t`orinstance,suchasshown in said patent. The fixed member consists of a bar 71, its ends entering the openings 6 ot' the brackets B, the base of the bar on each side being provided with lateral teeth h2 triangular in cross-section, Fig. 2, with upwardlyconverging faces. Said bar h extends below and between the two banks or series of detectors across the loom, the teeth h2 projecting beyond the bar in the path of a released detector, the lower end of the latter being directed by the beveled faces of the teeth h2 into the space between the bases of two of such teeth adjacent each other. As in said patent, one stroke of the feeler is positive and the oppositel stroke non -positive, and when on its positive stroke the teeth f register with the teeth h2 a released detector will enter the space between two adjacent feelerteeth and being held from movement by the corresponding stop-teeth h2 the non-positive or feeling stroke of the feeler will be arrested, and thereby the operation of the stopping means is effected in a manner well known to those skilled in the art.

Various changes or modifications may be made in the construction and arrangement herein shown and described without departing from the spirit and scope of this invention.

Having described the invention, what I claim, and desire to secure by Letters Patent, 1s-

j l. In a warp stop-motion, two lease-rods capable of limited rising-and-falling movelnent, two series of controlling-detectors in engagement with the divisions of the warp and located beneath the lease-rods, guides 5o for the detectors, and a normally reciprocating feeler to coperate with a released detector of either series.

2. In a warp stop-motion, two series of longitudinally-movable controlling-detectors in engagement with the divisions of the warp, two lease-rods, located respectively above the upper ends of the two series of detectors, whereby jumping of the latter is prevented, guides to direct the movement of the detectors, and a normally reciprocating feeler to cooperate with a detector of either series released by breakage of its warp-thread.

3. In a warp stop-motion, two opposed iixed brackets each having on its inner face downwardly-converging shoulders, a verticallymovable locking-wedge between them, a detectorsupport inserted between each shoulder and the wedge, means to move the wedge to clamp said supports in position, and aseparate device to release the wedge.

Lt. In a warp stop-motion, two opposed fixed brackets each having on its inner face downwardly-converging shoulders, two detectorsupports, means to detachably lock them against said shoulders, two rigidly-connected lease-rods located above the upper edges of said supports, and means to pivotally support and permit limited rise and fall of the lease-rods.

5. In awarp stop-motion, two opposed [ixed brackets each having on its inner face downwardly-con verging shoulders, a verticallymovable locking-wedge between them, a detector-support inserted between each shoulder and the wedge, a spring to support the wedge, and means to positively depress the latter against the action of the spring, to clampthedetector-supportsagainsttheshoulders.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALFRED E. STAFFORD. 

